* {
    margin: 0px;
    padding: 0;
}

.nav {
    width: 100%;
    background-color: #333;
    height: 50px;
}

.nav ul {
    list-style-type: none;
}

.nav>ul>li {
    float: left;
}

.nav ul li a:link,
.nav ul li a:visited {
    text-decoration: none;
    color: #fff;
    display: block;
    width: 160px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: #333;
}

.nav ul li a:hover,
.nav ul li a:active {
    background-color: rgb(179, 171, 171);
}

body {
    font-family: "Microsoft Yahei", sans-serif;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

header {
    font-weight: lighter;
    background-image: url(img/bg1.jpg);
    color: #fff;
    width: 100%;
    height: 900px;
    text-align: center;
    margin: 0 auto;
}

.title {
    display: inline-block;
    margin-top: 160px;
    font-size: 64px;
    font-weight: 700;
}


.passages {
    padding: 85px 25%;
    font-size: 20px;
    color: #fefefe;
    font-weight: 600;
}

.row {
    margin-top: -50px;
}

h1 {
    font-size: 36px;
    margin-bottom: 15px;
    text-align: center;
    color: black;
}

h3 {
    font-size: 20px;
    color: black;
    margin-top: 25px;
    font-weight: 600;
    text-align: left;
    margin-left: 418px;
}

p {
    font-size: 20px;
    color: black;
}

input[type=button] {
    width: 220px;
    height: 55px;
    margin: 3px;
}

#csdn,
#gitee,
#email {
    font-size: 25px;
    color: honeydew;
    cursor: pointer;
    border: 1px solid white;
}

#csdn {
    background-color: rgb(141, 141, 240);
}

#gitee {
    background-color: rgb(182, 178, 178);
}

#email {
    background-color: rgb(171, 233, 187);
    font-size: 25px;
    color: honeydew;
    cursor: pointer;
    border: 1px solid white;
}



div a img {
    width: 20px;
    height: 20px;
    text-align: left;
    margin-left: -660px;
    margin-top: 10px;
}


section {
    font-weight: lighter;
    /* background-image: url(../素材/images/屏幕截图\ 2021-09-21\ 184325.png); */
    color: #fff;
    width: 100%;
    height: 900px;
    text-align: center;
    margin: 0 auto;

}

.second {
    height: 900px;
    padding-bottom: 100px;
}


.second .about {
    font-size: 55px;
    margin-top: 30px;
    margin-bottom: 30px;
    font-weight: 700;
    margin-left: 625px;
}

.second>div:nth-child(1) {
    /* 此元素会被显示为行内块元素 */
    display: inline-block;
    /* 设置此元素的上外边距为120px */
    margin-top: 120px;
}

.second>div:nth-child(2) {
    /* 设置此元素的上外边距60px */
    margin-top: 60px;
    font-size: 48px;
    height: 170px;
    /* 字体粗细程度 */
    font-weight: lighter;
}

.info {
    width: 80%;
    height: 450px;
    margin: 0px auto;
    /* 设置此元素的上外边距60px */
    margin-top: 50px;
}

.info div {
    width: 50%;
    height: 120px;
    /* 字体对齐方式：左对齐 */
    text-align: left;
    /* 下内边框距20px */
    padding-bottom: 20px;
}

.phone,
.pencil {
    /* 向左浮动*/
    float: left;
}

.check,
.setting {
    /* 向右浮动 */
    float: right;
}

.info div img {
    /* 设为块级元素 */
    display: block;
    float: left;
    padding: 0 15px 80px 20px;
}

.info div h1 {
    /* 下内边框距10px */
    padding-bottom: 10px;
}


.about {
    font-size: 40px;
    margin-top: 100px;
    margin-bottom: 35px;
    font-weight: 700;
    /* margin-left: 670px; */
}

.ss {

    margin-bottom: 35px;
}

#third {
    height: 750px;
    background-image: url(../素材/images/屏幕截图\ 2021-09-21\ 192430.png);
    text-align: left;
    background-size: cover;
    color: white;
    /* 字体宽度 */
    font-weight: lighter;
}

.supportive {
    width: 32%;
    height: 430px;
    /* 向左浮动 */
    float: left;
    /* 设置内边距上150px 右，下0 左50% */
    padding: 150px 0 0 10%;
}

.supportive h1 {
    font-size: 40px;
    font-weight: lighter;
}

.supportive h2 {
    font-size: 30px;
    font-weight: 900;
    margin-left: 180px;
    color: white;


}

.supportive li {
    font-size: 18px;
    font-weight: 700;
    color: black;
    margin-left: 150px;
}

.ipad {
    width: 40%;
    height: 100%;
    /* 向右浮动 */
    float: right;
    margin-top: 200px;
    margin-right: 150px;
}

.ipad img {
    width: 100%;
    border-radius: 5%; /*正方形图片变成圆形*/
    height: 350px;
}


#fourth {
    height: 750px;
    background-image: url(../素材/images/1544148179-WzFspnGEQg.png);
    text-align: left;
    background-size: cover;
    color: white;
    /* 字体宽度 */
    font-weight: lighter;
}

.work {
    width: 35%;
    height: 430px;
    /* 向左浮动 */
    float: left;
    /* 设置内边距上150px 右，下0 左50% */
    padding: 150px 0 0 10%;
}

.work h1 {
    margin-left: 150px;
    font-size: 40px;
    font-weight: lighter;
}

.work h2 {
    font-size: 30px;
    font-weight: 900;
    margin-left: 130px;
    color: rgb(17, 17, 17);
}

.work h3 {
    font-size: 30px;
    font-weight: 900;
    margin-left: 260px;
    color: rgb(14, 13, 13);


}

.work li {
    font-size: 18px;
    font-weight: 700;
    color: black;
}

.show {
    width: 40%;
    height: 100%;
    /* 向右浮动 */
    float: right;
    margin-top: 200px;
    margin-right: 150px;
}

.show img {
    width: 100%;
    border-radius: 5%; /*正方形图片变成圆形*/
    height: 350px;
}

